88 lines
3.1 KiB
Go
88 lines
3.1 KiB
Go
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// Copyright (c) 2017 Uber Technologies, Inc.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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package jaeger
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import (
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"time"
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)
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// SamplerOption is a function that sets some option on the sampler
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type SamplerOption func(options *samplerOptions)
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// SamplerOptions is a factory for all available SamplerOption's
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var SamplerOptions samplerOptions
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type samplerOptions struct {
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metrics *Metrics
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maxOperations int
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sampler Sampler
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logger Logger
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samplingServerURL string
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samplingRefreshInterval time.Duration
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}
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// Metrics creates a SamplerOption that initializes Metrics on the sampler,
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// which is used to emit statistics.
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func (samplerOptions) Metrics(m *Metrics) SamplerOption {
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return func(o *samplerOptions) {
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o.metrics = m
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}
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}
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// MaxOperations creates a SamplerOption that sets the maximum number of
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// operations the sampler will keep track of.
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func (samplerOptions) MaxOperations(maxOperations int) SamplerOption {
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return func(o *samplerOptions) {
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o.maxOperations = maxOperations
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}
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}
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// InitialSampler creates a SamplerOption that sets the initial sampler
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// to use before a remote sampler is created and used.
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func (samplerOptions) InitialSampler(sampler Sampler) SamplerOption {
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return func(o *samplerOptions) {
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o.sampler = sampler
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}
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}
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// Logger creates a SamplerOption that sets the logger used by the sampler.
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func (samplerOptions) Logger(logger Logger) SamplerOption {
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return func(o *samplerOptions) {
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o.logger = logger
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}
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}
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// SamplingServerURL creates a SamplerOption that sets the sampling server url
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// of the local agent that contains the sampling strategies.
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func (samplerOptions) SamplingServerURL(samplingServerURL string) SamplerOption {
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return func(o *samplerOptions) {
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o.samplingServerURL = samplingServerURL
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}
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}
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// SamplingRefreshInterval creates a SamplerOption that sets how often the
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// sampler will poll local agent for the appropriate sampling strategy.
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func (samplerOptions) SamplingRefreshInterval(samplingRefreshInterval time.Duration) SamplerOption {
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return func(o *samplerOptions) {
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o.samplingRefreshInterval = samplingRefreshInterval
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}
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}
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